Because Alleria was not siphoning fel magic? Being around fel doesn’t give you fel taint, you have to manually take it in.
And considering she was with the army of the Light, they almost certainly had magical items to feed her magic addiction. (If she even has one anymore, considering she was with the prime naaru)
Then I guess blood elves shouldn’t have had green eyes from the very beginning because they never siphoned it either.
At least you didn’t go full “b-but the fel juice”, kudos. But you really think crystals here and there have more power to affect a high elf than a planet being infested by fel?
I’ve done the starting quests several times, pre-cata and post cata. Not once have I seen one that required siphoning from a fel crystal. I’ve seen the ones for siphoning magic from creatures though.
Yeah, structures. That’s not them siphoning it and taking it into themselves, that video ruins your own headcanon.